Focusing subwavelength grating coupler for mid-infrared suspended membrane waveguide
Focusing subwavelength grating coupler for mid-infrared suspended membrane waveguide
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DOI：
10.1364/ol.37.001217
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发表时间：
2012-04-01
期刊：
影响因子：
3.6
通讯作者：
Tsang, Hon Ki
中科院分区：
文献类型：
--
作者：
Cheng, Zhenzhou;Chen, Xia;Tsang, Hon Ki
研究了一种中红外聚焦亚波长光栅耦合器和硅基悬膜波导。对于横电模式均匀SWG，时域有限差分模拟预测耦合效率为44.2%，1dB带宽约为220 nm，背反射率为0.78%，在2.75 μ m。然后，利用相位匹配公式将均匀SWG弯曲成聚焦SWG。用有限元法对SMW进行了分析和制作。使用Er 3（+）-Pr 3（+）共掺杂中红外光纤激光器进行器件表征。制作的中红外SWG耦合器具有24.7%的耦合效率。(C)2012美国光学学会
A mid-infrared (mid-IR)-focusing subwavelength grating (SWG) coupler and suspended membrane waveguide (SMW) on a silicon-on-insulator wafer are studied. For a transverse-electric mode uniform SWG, finite-difference time-domain simulation predicts 44.2% coupling efficiency with 1 dB bandwidth of about 220 nm and backreflection of 0.78% at 2.75 mu m. Then the uniform SWG is curved to a focusing SWG using a phase-matching formula. The SMWs are analyzed by the finite element method and fabricated. An Er3(+)-Pr3(+) co-doped mid-IR fiber laser is used for device characterization. The fabricated mid-IR SWG coupler has 24.7% coupling efficiency. (C) 2012 Optical Society of America